I left my friend group respectfully.

There's not about being selfish wanting to leave a group . Your right . You be free . Nothing selfish wrong with that.
You either be in a group and go mad .
What's selfish about that .
I wish I could go somewhere where no one knows and go away for a few years up the mountains on my own ,just food supply and my dog . I be happy out then

You need to do whats best for you. It's okay to be selfish sometimes to take care of yourself.

Wow so u didn’t want to feel like the mom there. Just guessing

If you needed to do that for you, that's just how it is.

People need to realize that sometimes people need time to themselves. Given freely, attention is not an unlimited resource

Nope. It's not your responsibility and you got to live your life too.